Quoted from
http://forums.augi.com/showthread.php?t=36508 dated: 2006-03-29, 10:36 AM
Quote Originally Posted by swiss cheese View Post
I've exported my model as a 3D dwf. All my units are set to metric in Revit, however, when I select an object in DWF Viewer, the properties are only displayed in imperial. Have I missed something completely obvious?!

Thanks in advance.
... 2 and a half years later, I am now running Design Review 2009 & have the same problem.

I have a drawing created in AutoCAD 2009 & it was set to metric.
I then exported it to DWF.
After opening the DWF file in Design Review 2009, I set the unit to "millimeters".
I measured a length on a part & you know what?
The dimension returned as 25.4 times as greater than the original one!
for example, a 620mm length shown on the dwg drawing then Design Review gives a 15748mm (= 620x25.4) on the DWF file.

Any Solution?

Thanks.